any idea what might cause the following -
palinopsia, progressively worsening over a period (so far) of about 6 months, recent development of muscle twitches, trouble reading black on white text and get interference patterns from contrasting high frequency patterns (like drainage grilles, escalator steps (grooved metal) etc ) had mri, blood tests, tests for lyme disease and nutritional (b12, calcium, D etc) and so far all is clear. any leads would be appreciated.. cheers,